KEY: S = Estimate does not meet publication standards because of high
sampling variability or poor response quality. - = Zero or Less than half the
unit shown; thus, it has been rounded to zero.

1 Ton-miles estimates are based on
estimated distances traveled along a modeled transportation network. 2 Coefficient of Variation.3 "Truck" as a single mode includes shipments that were made by
only private truck, only for-hire truck, or a combination of private truck
and for-hire truck.4 Estimates for pipeline exclude shipments of crude petroleum.

NOTES: Rows are not shown if all cells for that particular state by
mode have no data. For example, since North Carolina by "Pipeline"
has no data for any weight grouping, the entire mode of "Pipeline"
for that state was removed from this table.
However, if a state by mode has at least one row of data for one of
the weight groupings, then the entire state by mode is shown even though
there may be rows absent of data within that mode. For example, North Carolina by
"Air" has a few rows absent of data but since the other rows within
that mode do have data, that state by mode will be shown in its entirety for
all the weight groupings.Value-of-shipments estimates have not been
adjusted for price changes. Estimated measures of sampling variability for
each estimate known as coefficients of variation (CV) are also provided in
these tables. More information on sampling error, confidentiality protection,
nonsampling error, sample design, and definitions may be found at
http://www.bts.gov/publications/commodity_flow_survey/.

SOURCE: U.S. Department of Transportation, Research and Innovative
Technology Administration, Bureau of Transportation Statistics and U.S.
Department of Commerce, U.S. Census Bureau, 2007 Economic Census:
Transportation Commodity Flow Survey, December 2009.